Siphon-feed gas-generator.



PATBNTBD MAY 21, l1907. S. P. AARON & S. H. HAMILTON. SIPHON FEED GASGENERATOR.

APPLICATION FILED NOV.9,1906.

.vinti UNITED STATES SAMUEL FRANCIS AARON AND DELPHIA, PENNSYLVANIAPRESERVATION COMPANY, PORATION OF WEST VIRGINIA.

PATENT OFFICE.

SIPHON-FEED GAS-GENERATOR.

Specification of Letters Patent.

Patented May 21, 1907.

Application led November 9, 1906. Serial No. 342,637.

To a/ZZ whom, t may concern/f Be it' known that we, SAMUEL FRANCIS AARONand SAMUEL HARBERT HAMILTON, citizens of the United States., residing atPhiladelphia, in the county of Philadelphia and State of Pennsylvania,have invented certain new and useful Improvements in Siphon Feed GasGenerators; and We do hereby declare the following to be a full,

ro clear, and exact description of the invention, such as will enableothers skilled in the art to which it appertains to make and use thesame. l

For disinfecting and fumigating we have produced a gas generating devicehaving a siphon feed and in the claims appended hereto we will point outthe parts and combinations of parts which constitute our improvements inconnection with the zo accompanying drawing, in which,

Figure 1 is a vertical section of a gas generating device embodying ourinvention, showing the siphon-feed as operative and the device incondition for use.` Fig. 2 is an z 5 identical view showing theSiphon-feed as inoperative and the device in the condition in which itis charged and closed to render it portable.

Our invention is designed for use as a fu- 3o migator for woolens, furs,carpets, etc., and

for destroying moths, insect pests and vermin and for which purposes apoisonous gas is generated and delivered without pressure or force fromthe generator into a disinfect- 3 5 ing air tight closure or room andfor this purpose the device 'is charged, closed and rendered portablefor carriage to the closure in which it is to be opened and used and thearticles to be treated being contained Within 4o this closure.

The generator device consists of tWo mem bers a jar 1 of acid proofmaterial such as heavy sheet iron coated thickly with shellac andasphaltum varnish and open at the top for containing a chemical inliquid form and a smaller closed receptacle 2, suspended or supportedwithin the jar, preferably of lead but it may be of glass, or ofenameled ware for containing a chemical preferably in liquid 5o form. Asiphon is contained within the inner vessel, and has its long leg 3,passing through the top and the bottom thereof and purp oses' is open atboth ends, its lower end 4, opening into the j ar 5 and its short leg 5,opening into the long leg near the top of the vessel and opening thereinnear its bottom at 6, whereby the chemical liquid in the inner receptafcle is siphoned into the jar and combining with the chemical thereincauses the generation of gas Within the jar when the device is in use.The upper end 7, of the long the Siphon passes through and opens at thetop of its containing vessel for the purpose of receiving a stopper 8,for closing this end' of the siphon when the siphon is operating. Thisupper open end of the Siphon also affords access into the Siphon for theinsertion of a stopper 9, for closing the short leg at its junction withthe long leg to close the siphoning tube when the device is notoperating and for the convenient insertion of the stopper and its propersealing action the upper end of the Siphon leg is preferably madeflaring. For this purpose I prefer to use a doubleiended stopper, bothStoppers preferably of rubber connected by a stem 10, of a material notaffected by the chemical, the stopper S, being adapted for closing theopen end of the siphon when the device is in use and the stopper 9,adapts it for insertion into the long leg to close the opening of theshort leg at its junction with the long leg when the device is not inuse, only one stopper being used at a time by reversing their positions.But obviously a single or separate Stoppers may be used for theirseparate purposes.

The top of the inner receptacle is provided With a necked opening closedby a suitable stopper 1l, having two openings one 12, of which has aconnected tube 13, from which a piece of hose 14, leads by which air maybe blown or forced into the receptacle upon the surface of the chemicalliquid therein for the purpose of starting the Siphon. For this purposethe air need only be forced in for a few moments and by acting on thesurface of the liquid chemical causes it to be forced u into and throughthe short leg of the Siphon into the long leg from which it drops andmixes with the chemical in the jar. The siphon having been started thefeed is continued by a normal external air pressure lby means of asecond opening 15, in the stopper, which however, mustA be closed duringthe leg of 1 IOO . opening time that the forced air pressure ismaintained in the space above the liquid, and for this purpose a valve16, is carried at the inner end of the stopper in position to openinward and to close this normal air inlet to cause the air pressure tohave its full displacing effect on the liquid. When such air pressure isstopped this valve is caused to open to render active the normal airpressure through the stopper opening 15, to continue the siphon feed. Veprefer to form the wall of the jar near its upper open end with acircumferential crimp so as to form an inward standing shoulder 17, onwhich to suspend the inner receptacle by means of radial arms 18,theends of which rest on the shoulder and project from a ring 19, whichis preferably of lead and fastened to the receptacle. The chemical issupplied in the jar through its upper open end, and the chemical issupplied in the inner receptacle through the which is closed by thestopper which has the air starting opening. l

The Siphon-containing receptacle can be lifted out of the jar `andcharged with the chemical, the blow tube stopper put in place and theduplex stopper closing the siphon so that it` cannot be accidentallystarted. In this condition the device is ready for use when placed in anair tight closure, by removing the stopper to open the Siphon, closingthe upper open end of the long leg of the Siphon and starting the Siphonby the blow tube when the generated gas will freely pass up around theinner receptacle and out of the open end of the jar into the air in theclosure to effect the fumigation of its contents. But to render thedevice safely handled by carriage a lid 20, is provided for closing thejar by a suitable air tight joint a convenient construction for which ismade by forming the upper edge of the jar with a convex roll or bead onwhich the lid is seated and securing the lid thereon by clamp screws 21,carried by brackets 22, hinged to the outer wall of the jar. When thelid is closed the blowhose 14, is removed and is connected to thestopper when the lid is removed at the place where the device is to beused. The starting blow-hose is provided as it gives the advantage ofallowing the operator to withdraw at a safe distance from the device toblow through the tube and the operator need not therefore be within theclosure to be fumigated in starting the device.

While we do not wish to be confined to any particular character of gas,or to any particular chemicals because they may be varied according toconditions, yet as to the character of the gas it may be carbonic acid,hydrocyanic acid, hydrochloric acid or a mixture of these gases. Or thegas may be bromin, chlorin, or some related poisonous gas which it wouldbe dangerous to inhale. To give an example of the chemical liquid andthe chemical employed and supposing that'it is required to-fumigate fordisease and stench, the inner receptacle would be supplied with somedilute acid liquor, for example, hydrochloric acid, and the jar suppliedwith some chemical that would evolve,-say chlorin (as chlorinated lime)when the acid came in contact with the gas producing chemical. In thisoperation the liquid chemical from the inner receptacle when united withthe chemical in the jar forms a chemical combination and gives off orgenerates a poisonous gas which is fatal to animal, insect, or germ lifeand is caused to pass freely and without pres sure from said jar into aclosure, house, ship or cellarwhich obviously must be air tight and inwhich the generator is placed with the cap removed so that the gas doesnot collect under pressure in the generating jar but it is passedtherefrom into the air in the fumigating closure. Instead of the duplexstopper obviously a single stopper may be used, but I prefer theseparate stoppers because they are more certain in their functions.

Ve claim:

1. In a gas generator, a jar open at its top, a closed receptacle Withinsaid jar, a siphon Within the closed receptacle having its long leg openat the top of the closed receptacle and its lower end opening into thejar, a stopper for closing the upper open end of the siphon when thedevice is in use, and a stopper for stopping the siphoning action whenthe device is not in use, and means adapted to establish gaseouspressure within the closed receptacle for starting the siphon byintroducing air under pressure into said receptacle from an externalsource, whereby a chemical is fed from the closed vessel into a chemicalin the jar.

2. In a gas generator, ayjar open at its top, a closed receptacle withinsaid jar, a siphon within the closed receptacle having the upper end ofits long leg open at the top of the closed receptacle, and its lower endopening into the jar, the short leg connected with and opening into thelong leg near its upper open end, a stopper adapted to close the upperopen end of the sphon when the Siphon is in use, and a stopper forstopping the siphoning action when the device is not in use, and meansadapted to establish gaseous pressure within the closed receptacle forstarting the siphon by introducing air under pressure into saidreceptacle from an external source, whereby a chemical is fed from theclosed vessel into a chemical in the jar.

3. In a gas generator, a j ar open at its top, and adapted to contain achemical, a closed receptacle within said jar and adapted to contain achemical, a siphon within the closed receptacle having the lower end ofits long leg opening into the jar, its upper end passing through the topthereof and open, the short leg connected with and opening IOO ' forstarting the siphon by introducing air uninto the long leg near itsupper open end, and a pair of stoppers connected in separated relationone adapted to close the communication between the short and the longlegs, the other adapted to close the upper open end of the long leg, andmeans adapted to establish gaseous pressure within the closed receptacleder pressure into said receptacle from an eX- ternal source.

4. In a gas generator, a jar open at its upper end and having an annularinterior wall crimped shoulder, a closed receptacle suspended upon saidshoulder, a sphon within the closed receptacle having the lower end ofits long leg opening into the jar, its upper end passing through the topof said receptacle 5 and open, the short leg connected with and openinginto the long leg near its upper open end, a stopper for closing theupper open end of the siphon when the device is in use, and a stopperfor stopping the siphoning action when the device is not in use, meansadapted to establish gaseous pressure within the closed receptacle forstarting the Siphon by introducing air under pressure into saidreceptacle from an external source, and a removable cover whereby toclose and seal the open end of the jar to render the device safelyportable.

In testimony whereof we have signed our names to this specification inthe presence of two subscribing witnesses.

SAMUEL FRANCIS AARON.

SAMUEL HARBER-T HAMILTON.

Witnesses:

H. MERWIN ALLEN, v FRANK R. BUCHANAN.

